Monitoring Theophylline and Caffeine Levels in Suspected Toxicity Is a Good Tool for Physician

To the Editor. We have read with great interest the case of caffeine intoxication reported by Yoshimine et al., in which the theophylline level served as an indicator of treatment, and the caffeine level was measured. Based on our reading, we found that it is important to consider the clinical management of caffeine intoxication.